Form tie anchor with reciprocable slide



United States Patent Inventors Volker Rassbach Englewood; John C. McArdle, 3300 S. Holly St., Denver, Colorado 80222 Appl. No. 683,675

Filed Nov. 16, 1967 Patented Dec. 1, 1970 Assignee Said Rassbach assignor to said McArdle FORM TIE ANCHOR WITH RECIPROCABLE SLIDE 3,315,938 4/1967 Gates FOREIGN PATENTS 553,461 2/1958 Canada 292ll(Digest) Primary Examiner-Robert D. Baldwin Attorney-Van Valkenburgh and Lowe ABSTRACT: A form tie loop terminal anchor detachably applicable to features of conventional construction for attain ment of customary purpose and is unitarily constituted as a conveniently rectangular, flat plate of appropriate size and rigid material having one smooth, plane face adapted for pressure engagement exteriorly against a form wall, side margin flanges inturned relative to its other face and therewith defining a slideway, an aperture loosely accommodative of a tie loop terminal centrally transverse of an adjacent one end of the slideway, a slide engaged for limited reciprocation in the slideway, a fixed nose projection at one end of the slide reciprocable therewith across the plate aperture into and away from intrusion through an associated tie loop terminal, the nose being inwardly offset at an appropriate position to be yieldably retentive of the nose and loop terminal interengagemenl. As an optional facility, a waler supplement is integrated with and at one end of the plate.

Patented Dec. 1, 1970 w I 3,544,059

I Shoat L of 2 v FIG.

l/V VE/V TORS. VOL KER RA 8854 CH JOHN 0. M64 RDL E ATTORNEYS FORM TIE ANCHOR WITH RECIPROCABLE SLIDE This invention relates to form tie anchors, utilized in reinforced concrete wall construction for anchoring form ties which space and maintain form walls in position for the pouring of concrete therebetween.

Conventional form casting of concrete walls has involved the use of a variety of specific form ties, among which a type distinguished by narrow, elongated terminal loops, outstanding beyond fixed spacing stops, to obtrude from holes in the form walls for coaction with exterior anchors is in widespread, general favor. Also, anchors coactable with the loop protrusions of such tiesare available in considerable diversity of specific structure alike, necessarily, in the provision of a member applicable to and removable from intrusion through the loop exterior to the form wall and effective to stress the tie in reaction to a pressure bearing against the contiguous form wall area. Some of the anchors suited for use with terminal- Iooped ties require association with walers, strongbacks, and the like, as to which the utility and necessity are manifest, while others of the available such anchors qualify as supporting locaters for reinforcing and alining features of the form walls. However, many such anchors are inexpedient of practical use, expensive in production and conditioning for reuse, and inflexibly restricted asto specific adaptation, the merits and demerits of known prior art developments in the field of the present invention thus inspiring continuing search for improvement.

A principal object of the invention is to provide a novel and improved anchor for terminal-looped form ties which is amenable to practical use in diverse specific situations.

A further object of the invention is to provide a novel and improved anchor for terminal-looped form ties which is directly and reliably effective in primary connection to a loop terminal.

A further object of the invention is to provide a novel and improved anchor for terminal-looped form ties that is secure in self-retained coaction with'a loop terminal.

A further object of the invention is to provide a novel and improved anchor for terminal-looped form ties which is facile of uncomplicated application to and removal from use positions and associations.

A further object of the invention is to provide a novel and improved anchor for terminal-looped form ties which is suited, at option, to support and locate a waler.

' A further object of the invention is to provide a novel and improved anchor for terminal-looped form ties which is expedient of economical production in correlated embodiments, which is sturdy, durable and long lived in repetitious use, and which is positive and efficient in attainment of the ends for which designed.

Additional objects and the novel features of this invention will become apparent from the description which follows, takenin connection with the accompanying drawings, in which:

FIG. 1 is a condensed, side elevation of a typical form wall arrangement utilizing a terminal-looped tie coacting at one end with one form of anchor of this invention and at its other end with another form of anchor, particularly adapted for use with a waler, an intermediate portion of the tie length being broken away to conserve space;

FIG. 2 is a perspective viewof the anchor shown at the left in FIG. 1, with a slide thereof retracted to an initial position, prior to engagement with a form tie loop;

FIG. 3 is a perspective view similar to FIG. 2 but showing the slide moved to a loop engaging position;

FIG. 4 is a transverse section, on an enlarged scale, taken along line 4-4 of FIG. 2;

FIG. 5 is a side elevation, on the same scale as FIG. 4, showing separately the slide of the anchor;

FIG. 6 is a transverse section, taken along line 6-6 of FIG. 5;

FIG. 7 is a bottom plan view, on a further enlarged scale, of the slide shown separately in FIG. 5;

FIG. 8 is a fragmentary perspective view, on an enlarged scale, of a waler and the anchor form of this invention particularly adapted for use with the waler; and

FIG. 9 is an elevation, on a further enlarged scale, of the waler anchor of FIG. 8, showing particularly an end flange which is attached to the waler in use.

Conventional practice in the form casting of concrete walls is generally characterized by the use of form ties of diverse speciality alike applicable to space and consolidate form walls 10 with provision for expeditious removal of the latter. Within the category of known and available form ties is a type having narrow, elongated, end loops l1 outstanding as alined extensions of a straight, inextensible, twisted wire tie section 12, with stops 14 of the tie disposed at the inner ends of loops 11. Also shown in FIG. 1 are thimbles or cones C abutting tie stops 14 and each provided with a sealing lip 13 at its outer end, such cones being constructed in the manner disclosed in the copending U.S. Pat application of John C. McArdle, Ser. No. 683,212, filed Nov. 15, 1967 now U.S. Pat. No. 3,514,020. Tie loops 11, normally beyond stops 14 but, in the installation shown, beyond cones C, extend through holes in the form walls 10 for connection with suitable anchors bearing exteriorly on the form walls. Thus, the instant invention is directed to the provision of anchors suited for practical and efficient coaction with the tie loop terminals in the operative relation set forth, such as anchor A of FIG. 1 which engages a tie loop 11 and bears directly against the outside of the form wall 10 and also anchor A which will be described later.

An anchor A of this invention, as in FIGS. 2 and 3, includes a rectangular base or plate 15 of appropriate size and suitable strong material, such as steel or other suitable metal. With one smooth, plane face suited to bear with pressure engagement against an exterior area of a form wall 10, the plate 15 is formed as by stamping, to upturn its long side margins as spaced parallel reinforcing and stiffening flanges 16, to provide a central, transverse aperture 17 therethrough, inwardly adjacent one end to freely accommodate passage of a tie loop terminal 11 through the plate, to upturn spaced and parallel lugs 18 at each side edge of aperture 17, for a purpose described later, and to provideholes 19 for the passage of fasteners in expedient number and array. Longitudinally of the plate 15, but toward the end remote from the position of aperture 17, flanges 16 are inturned as overhanging lips 20 which define a slideway for a slide 5.

Slide S may be integrally formed form suitable strong, rigid material, as by stamping, to provide an elongated wedging nose 21 of a width slidably receivable between the lugs 18 and tapered in depth with reference to its undersurface from a tip 22 to merge with a laterally convex ridge 23 having a top edge parallel to base 15. From the underside of each opposite side of the ridge, a flat, rectangular flange 24 extends laterallyfor reception in the slideway defined by the lips 20, so that the slide and webs can be reciprocated on and in overlying contact with the area of the plate 15, with consequent reception of the nose 21 between the lugs 18 at the positions of FIGS. 2 and 3 and intermediate thereof in each direction. In the position of FIG. 2, end 22 of nose 21 clears the portion of aperture 17 through which a loop 11 is to extend, but the slide S is prevented from moving further away from aperture 17 by bumps or bosses 25 extruded from the underside of plate 15, after the slide S has been assembled to the base. In FIG. 3, slide S is moved to a position fully engaged with a loop 11, with flanges 24 abutting lugs 18 and the tie loop moved onto ridge 23 to indentations 26 of FIGS. 6 and 7, in which the sides of the loop are received to hold the slide in loop engagement through the resiliency of the loop.

For installation of an anchor -A, a loop 11 is inserted through the corresponding hole in the form wall 10, then the anchor A placed over the loop with the loop extending through aperture 17 and the slide S in the position of FIG. 2. A forward movement imparted to the slide will causes nose 21 to enter the loop, whereupon, or previously, if desired, the anchor may be attached to the form wall by suitable fastening devices, such as nails, driven through holes 19 into the form wall. Then, an impact, as by a hammer, on the rear end of the slide will drive the nose further into the loop, stretching and pulling the loop outwardly as the loop rides along nose 22 and then along ridge 23. When movement of the slide is stopped by abutment of flanges 24 against lugs 18, as in FIG. 3, loop 11 will have reached the indentations 26 in the sides of the slide.

For removal of the form wall, each anchor may be disconnected from the associated tie by tapping the flat end 22 of nose 21, which is exposed above base 15, as in FIG. 3, to move the slide rearwardly until flanges 24 reach bumps 25. Of course, as soon as the loop reaches nose 21, the slide will 'move more freely. The anchors A may remain on the form boards, for reuse of the form boards, since the base 15 is attached to the form board and slide S is restricted in movement and cannot be lost.

Anchor A as in FIGS. 1 and 8, is adapted to be attached to a waler 29, as of wood, which extends laterally of the form boards, as shown, or may be upright. Anchor A is similar to anchor A by including a base or plate 15 having side flanges l6 and lips 20, an aperture 17, lugs 18 and bumps 25, as well as a slide S having a nose 21 with an end 22, a ridge 23, side flanges 24 and indentations 26 in the sides of ridge 23, all similar to the corresponding parts of FIGS. 2 and 3 and operable in the manner previously described. In addition, anchor A is provided with a waler bracket 30 formed as an integral extension of one end of plate 15. The bracket 30 is perpendicular to plate 15, as at the end thereof adjacent the aperture 17, and projects from the plate a distance exceeding the width of a waler 29, thereby to be supported. Bracket 30 is reinforced by continuations 31 of the flanges 16, while an integral extension 32 of the outer end of the bracket 30 carries aperpendicular, apertured tang 33 disposed to overlie and to be attached to the outward margin of the waler 29. To accommodate movement of nose 21 of slide S intoan associated loop, the bracket 30 has an aperture 34 adjacent its angular'conjunction with the plate 15, to open therethrough a travel path for said nose, as in FIGS. 8 and 9. As will be evident, extension of nose 21 through aperture 34 permits end 22 of the nose to be tapped for disengagement of slide S from a form tie loop 11, when the forms are to be removed-Anchor A may be secured to the form board 10 and waler 29 by nails 35, driven through holes 19, shown in FIG. 3, and a similar hole in tang 33. The installation of an anchor A is similar to that previously described in connection with anchor A, except that an anchor A may be mounted on a form board 10, either before or after connection to a form tie, and a waler 29 supported by several anchors A in lateral alinement, then attached to the waler. The nail 35 through tang 33 may be double headed, to permit easier removal from the waler when the form is removed, it being noted that the anchors A may remain mounted on the form boards, for reuse thereof.

Although alternative embodiments of this invention have been illustrated and described, it will be evident that other embodiments may exist and that various changes may be made therein, all without departing from the spirit and scope of this invention.

We claim:

1. An anchor coactable with the extremities of terminalwith inclined means for engaging a tie terminal loop extending through said aperture upon movement of said slide in one direction; 7 said base having a forward stop for said slide; and said aperture having a forward edge extending transverse to the direction of movement of said slide said edge of said aperture being positioned longitudinally relative to said stop, so that the maximum height of said slide will correspond to said aperture when said slide engages said stop.

2. An anchor as defined in claim 1, wherein:

said base is generally rectangular and the sides thereof are upturned as parallel flanges opposite the bearing face of said base; and

said slideway is provided by lips inturned from said flanges into overhanging relation with contiguous areas of said base.-

3. An anchor as defined in claim 2, wherein: said slide is provided with coplanar, lateral flanges marginally receivable under said lips.

4. An anchor as defined in claim 3, wherein: said base is provided with means for limiting the range of slide reciprocation relative to the base with concomitant inhibition of slide and-plate separation, comprising spaced lugs upturned from the base adjacent said aperture forming said forward stop and extrusions of the base material obstructing the end of the slideway remote from said aperture.

5. An anchor coactable with the extremities of terminallooped form ties extending through a form wall, comprising:

a generally flat, unitary base with a bearing face on one side for flatly engaging said form board, a slideway longitudinally of its other side and an aperture for the passage of a form tie loop generally centrally and adjacent one end thereof;

a slide reciprocable in said slideway and bearing against the flat opposite side of said base, said slide being provided with inclined means for engaging a tie terminal loop extending through said aperture upon movement of said slide in one direction; and said base being provided with a bracket outstanding perpendicularly away from the bearing face of said base and at the end of said base adjacent said aperture to provide a support for superposed waler.

6. An anchor as defined in claim 5, wherein:

an extension of the outer end of said bracket has a tang offset from a perpendicular to said extension related to overlie the outer edge of an associated waler; and

said bracket is provided with an aperture adjacent said base for extension of said nose therethrough when said slide is moved into engagement with a form tie loop. 

